If 270 kg tiger running at 13 m/s tackles a 130 kg terrified physics teacher run/jogging as best as he can at 8.5 m/s away from the tiger. What is the velocity of the combined mass once the tigers ferocious maw locks on to his shoulder?

(**i would really appreciate if this was answered soon** ) which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

What determines the amount of inertia an object has

Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.